In October 2012 I (Markus) had to travel to the Splash 2012 conference in Tucson. I combined the trip with a few podcast recordings.
The absolute high point of this trip (and on of the best omega tau on-site episode recordings) was my visit to the Large Binocular Telescope on Mount Graham. Here is a little write-up about the trip and the episode on it.
I also talked to Mitchell Pavao-Zuckerman about Biosphere 2 and his research on various topics on ecology. Finally, I visited the Planetary Science Institute where I recorded three conversations: on planetary science in general (with Mark Sykes), on Comets (with Bea Mueller) and on the creation of the moon (with Don Davis and Bill Hartmann).